{"product_id":"kw11-3z-micro-limit-switch-with-roller-lever-3-pin-spdt-5a-250vac","title":"KW11-3Z Micro Limit Switch with Roller Lever - 3-Pin SPDT 5A 250VAC","description":"\u003cstyle\u003e\n.nznpd{--o:#F57C00;--od:#E65100;--ink:#0F172A;--mut:#5b6573;--line:#E8ECF0;--soft:#F7F8FA;max-width:1120px;margin:0 auto;color:var(--ink);font-family:inherit;line-height:1.6}\n.nznpd,.nznpd *{box-sizing:border-box}\n.nznpd p{margin:0;color:var(--mut);font-size:15px;line-height:1.65}\n.nznpd strong{color:var(--ink)}\n.nznpd__intro{font-size:16px;color:var(--ink);font-weight:500;line-height:1.6}\n.nznpd__checks{list-style:none;padding:0;margin:22px 0 0;column-count:2;column-gap:26px}\n.nznpd__checks li{display:flex;gap:11px;align-items:flex-start;font-size:15px;color:var(--ink);line-height:1.45;break-inside:avoid;-webkit-column-break-inside:avoid;margin-bottom:13px}\n.nznpd__checks li::before{content:\"\\2713\";flex:0 0 auto;width:21px;height:21px;margin-top:1px;border-radius:999px;background:#FFF3E8;color:var(--o);font-size:12px;font-weight:900;line-height:21px;text-align:center}\n.nznpd__qs{background:linear-gradient(170deg,#FFF9F3,#FFF1E6);border:2px solid #FCE0C6;border-radius:16px;padding:22px}\n.nznpd__qs h3{margin:0 0 16px;font-size:12px;font-weight:800;letter-spacing:.09em;text-transform:uppercase;color:var(--od)}\n.nznpd__steps{list-style:none;counter-reset:s;padding:0;margin:0;display:grid;gap:14px}\n.nznpd__steps li{display:grid;grid-template-columns:27px 1fr;gap:12px}\n.nznpd__steps li::before{counter-increment:s;content:counter(s);width:27px;height:27px;border-radius:999px;background:#fff;border:2px solid #FCE0C6;color:var(--od);font-weight:800;font-size:13px;display:flex;align-items:center;justify-content:center}\n.nznpd__steps strong{display:block;font-size:14px}\n.nznpd__steps p{font-size:13px;margin-top:2px;line-height:1.45}\n.nznpd__block{margin-top:36px;padding-top:30px;border-top:1px solid var(--line)}\n.nznpd__h{margin:0 0 28px;font-size:1.15rem;font-weight:800;letter-spacing:-.02em;color:var(--ink);display:flex;align-items:center;gap:10px}\n.nznpd__h::before{content:\"\";flex:0 0 auto;width:20px;height:3px;border-radius:2px;background:var(--o)}\n.nznpd__specs{border:2px solid var(--line);border-radius:12px;overflow:hidden}\n.nznpd__spec{display:grid;grid-template-columns:minmax(150px,.7fr) 1fr;gap:18px;padding:12px 16px;font-size:14px}\n.nznpd__spec:nth-child(odd){background:var(--soft)}\n.nznpd__spec span{color:var(--mut)}\n.nznpd__spec strong{font-weight:700}\n.nznpd__included{display:flex;gap:16px;align-items:center;border:2px solid var(--line);border-radius:16px;background:var(--soft);padding:18px 20px}\n.nznpd__qty{flex:0 0 auto;width:46px;height:46px;border-radius:12px;background:#FFF3E8;color:var(--o);font-weight:800;display:flex;align-items:center;justify-content:center}\n.nznpd__included strong{display:block;font-size:15px;margin-bottom:3px}\n.nznpd__uses{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}\n.nznpd__use{padding:13px 14px;background:var(--soft);border-left:3px solid var(--o);border-radius:0 10px 10px 0;font-size:14px;color:var(--ink);line-height:1.4}\n.nznpd__faqs{display:grid;gap:10px}\n.nznpd__faq{border:2px solid var(--line);border-radius:12px;background:#fff;padding:0 16px;transition:border-color .18s ease}\n.nznpd__faq[open]{border-color:#FCE0C6}\n.nznpd__faq summary{list-style:none;cursor:pointer;padding:15px 0;font-weight:700;font-size:14px;color:var(--ink);display:flex;justify-content:space-between;align-items:center;gap:12px}\n.nznpd__faq summary::-webkit-details-marker{display:none}\n.nznpd__faq summary::after{content:\"\\203A\";flex:0 0 auto;color:var(--o);font-weight:800;font-size:20px;line-height:1;display:inline-block;transform:rotate(90deg);transition:transform .22s ease}\n.nznpd__faq[open] summary::after{transform:rotate(-90deg)}\n.nznpd__faq p{padding:0 0 16px;font-size:14px}\n.nznpd__faq[open] p{animation:nznpdReveal .24s ease}\n@keyframes nznpdReveal{from{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}\n.nznpd p.nznpd__note{margin-top:16px;background:var(--soft);border:2px solid var(--line);border-radius:12px;padding:14px 16px;font-size:13.5px;color:var(--mut);line-height:1.55}\n@media(prefers-reduced-motion:reduce){.nznpd__faq summary::after{transition:none}.nznpd__faq[open] p{animation:none}}\n@media(max-width:749px){.nznpd__checks{column-count:1}.nznpd__uses{grid-template-columns:1fr}.nznpd__spec{grid-template-columns:1fr;gap:2px}}\n\u003c\/style\u003e\n\u003cdiv class=\"nznpd\"\u003e\n\u003cdiv class=\"nznpd__lead\"\u003e\n\u003cp class=\"nznpd__intro\"\u003eThis roller lever KW11-3Z pairs the classic snap-action micro switch body with a sprung metal lever and a free-spinning roller wheel, rated 5A at 250VAC. The wheel rolls smoothly over cams, carriages and sliding parts instead of scraping against them, making it the pick for positions where something travels across the switch. Its three terminals (common, normally-open and normally-closed) let you wire it as either a normally-open or normally-closed trigger, and the snap-action mechanism delivers a crisp, repeatable click every time.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cul class=\"nznpd__checks\"\u003e\n\u003cli\u003eSPDT contacts with one common (C), one normally-open (NO) and one normally-closed (NC) terminal\u003c\/li\u003e\n\u003cli\u003eRoller wheel on a sprung lever for smooth, low-friction triggering from moving parts\u003c\/li\u003e\n\u003cli\u003eRated 5A at 250VAC, handles mains or low-voltage DC switching\u003c\/li\u003e\n\u003cli\u003eSnap-action mechanism for a sharp, repeatable trigger point\u003c\/li\u003e\n\u003cli\u003eLong life, rated for over 1,000,000 operating cycles\u003c\/li\u003e\n\u003cli\u003eLow contact resistance of 50 mOhm or less\u003c\/li\u003e\n\u003cli\u003eHigh insulation resistance of 100 MOhm or more\u003c\/li\u003e\n\u003cli\u003eDielectric strength 1000VAC for 1 minute\u003c\/li\u003e\n\u003cli\u003eStandard KW11-3Z body and mounting, drops into common endstop brackets\u003c\/li\u003e\n\u003cli\u003eIdeal as a 3D printer or CNC endstop, door sensor or travel limit switch\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003ch3 class=\"nznpd__h\"\u003eSpecifications\u003c\/h3\u003e\n\u003cbr\u003e\n\u003cdiv class=\"nznpd__specs\"\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eModel\u003c\/span\u003e\u003cstrong\u003eKW11-3Z (roller lever)\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eType\u003c\/span\u003e\u003cstrong\u003e3-pin SPDT roller lever micro limit switch\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eContact Form\u003c\/span\u003e\u003cstrong\u003eSPDT with 1 common, 1 NO, 1 NC\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eTerminals\u003c\/span\u003e\u003cstrong\u003e3 pins (C \/ NO \/ NC), solder or spade\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eActuator\u003c\/span\u003e\u003cstrong\u003eSprung metal lever with roller wheel\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eLever Length\u003c\/span\u003e\u003cstrong\u003e14.5 mm\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eRated Current \/ Voltage\u003c\/span\u003e\u003cstrong\u003e5A 125VAC \/ 5A 250VAC\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eContact Resistance\u003c\/span\u003e\u003cstrong\u003e50 mOhm max\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eInsulation Resistance\u003c\/span\u003e\u003cstrong\u003e100 MOhm min\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eDielectric Strength\u003c\/span\u003e\u003cstrong\u003e1000VAC for 1 minute\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eMechanical \/ Electrical Life\u003c\/span\u003e\u003cstrong\u003e1,000,000 cycles min\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eBody Size\u003c\/span\u003e\u003cstrong\u003e19.8 x 10.2 x 6.4 mm\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eMounting\u003c\/span\u003e\u003cstrong\u003e2 x 2.35 mm holes, 8.5 mm spacing\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eWeight\u003c\/span\u003e\u003cstrong\u003eApprox 2.5 g\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003ch3 class=\"nznpd__h\"\u003eWhat's in the pack\u003c\/h3\u003e\n\u003cbr\u003e\n\u003cdiv class=\"nznpd__included\"\u003e\n\u003cdiv class=\"nznpd__qty\"\u003ex\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eKW11-3Z Roller Lever Micro Limit Switches\u003c\/strong\u003e\n\u003cp\u003eQuantity as selected. Ready to wire, no extra components required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003ch3 class=\"nznpd__h\"\u003eGreat for\u003c\/h3\u003e\n\u003cbr\u003e\n\u003cdiv class=\"nznpd__uses\"\u003e\n\u003cdiv class=\"nznpd__use\"\u003e3D printer X \/ Y \/ Z endstops\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eCNC and laser-cutter travel limits\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eDoor, lid and drawer detection\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eRobotics bump and contact sensors\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eConveyor and gantry end-of-travel limits\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eGeneral DIY automation and Arduino projects\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003cdiv class=\"nznpd__qs\"\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003col class=\"nznpd__steps\"\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eIdentify the three terminals\u003c\/strong\u003e\n\u003cp\u003eThe rear of the body is moulded NC, NO and C, so there is no guesswork: the pin marked 1 is normally-closed (NC), the centre pin marked 3 is normally-open (NO), and the pin marked 2 is common (C). Confirm with a multimeter in continuity mode if you are unsure.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eChoose NO or NC\u003c\/strong\u003e\n\u003cp\u003eWire C + NO for a circuit that closes (turns on) when the roller is pressed, or C + NC for one that opens (turns off) when pressed. For 3D printer and CNC endstops, NC wiring is often preferred so a broken wire reads as triggered.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eMount the switch\u003c\/strong\u003e\n\u003cp\u003eFix it through the two mounting holes so the roller meets your moving part right at the travel limit. Angle the switch so the part rolls onto the wheel rather than hitting it end-on, and leave a little over-travel so the switch fully actuates.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eTest the click\u003c\/strong\u003e\n\u003cp\u003ePress the roller by hand. You should feel a firm snap and hear a distinct click as the contacts change over. Confirm the switching with a multimeter before wiring it into your machine.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003ch3 class=\"nznpd__h\"\u003eCommon questions\u003c\/h3\u003e\n\u003cbr\u003e\n\u003cdiv class=\"nznpd__faqs\"\u003e\n\u003cdetails class=\"nznpd__faq\" open\u003e\n\u003csummary\u003eWhen should I choose the roller version?\u003c\/summary\u003e\n\u003cp\u003eThe roller wheel is ideal where a cam, carriage, gantry or sliding part travels across the switch rather than pressing it straight on. The wheel rolls over the moving surface with very little friction or wear, giving smooth, reliable triggering. If your target presses the switch head-on, the plain or lever KW11-3Z versions suit better.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"nznpd__faq\"\u003e\n\u003csummary\u003eWhat do the three pins do?\u003c\/summary\u003e\n\u003cp\u003eThis is an SPDT (single-pole double-throw) switch. The common terminal (C) connects to the normally-closed (NC) contact when the switch is at rest, and to the normally-open (NO) contact when pressed. You only ever use two of the three pins for a given circuit, C plus whichever of NO or NC you need.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"nznpd__faq\"\u003e\n\u003csummary\u003eCan I use it as a 3D printer or CNC endstop?\u003c\/summary\u003e\n\u003cp\u003eYes. This is the roller version of the hugely popular KW11-3Z endstop, used across 3D printers, CNC machines and laser cutters. Wire C + NC (or C + NO to match your board's logic) and connect it to your controller's endstop input.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"nznpd__faq\"\u003e\n\u003csummary\u003eHow much can it switch?\u003c\/summary\u003e\n\u003cp\u003eIt is rated 5A at 250VAC, so it comfortably handles low-voltage logic signals (3.3V \/ 5V), DC loads and mains-voltage switching within that limit. Stay within the rating and observe normal mains-voltage safety practice when switching AC.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003cp class=\"nznpd__note\"\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e Two of the three terminals are used per circuit, common (C) plus either NO or NC. For machine endstops, NC wiring is commonly preferred so a damaged wire fails safe as \"triggered\". The switch is rated to 5A \/ 250VAC; keep within that limit and follow standard mains-voltage safety practice when switching AC.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"NZN Electronics","offers":[{"title":"Default Title","offer_id":42960563634272,"sku":"SW-KW11-3Z-3PIN-RL","price":1.85,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0664\/6127\/0112\/files\/KW11-3Z-Roller-3P-Hero.png?v=1784258990","url":"https:\/\/www.nznelectronics.co.nz\/products\/kw11-3z-micro-limit-switch-with-roller-lever-3-pin-spdt-5a-250vac","provider":"NZN Electronics","version":"1.0","type":"link"}